#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>

int main()
{
    printf("begin......\n");
    printf("begin......\n");
    printf("begin......\n");
    printf("begin......\n");
    execl("/usr/bin/ls", "ls", "-a", "-l", NULL);
    printf("end......\n");
    printf("end......\n");
    printf("end......\n");
    printf("end......\n");
    return 0;
}
